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JSF 2.2+ utility library

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/*
 * Copyright 2013 OmniFaces.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.omnifaces.cdi.viewscope;

import javax.enterprise.event.Observes;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.ProcessManagedBean;

import org.omnifaces.cdi.ViewScoped;

/**
 * Register the CDI view scope context.
 *
 * @author Radu Creanga {@literal }
 * @author Bauke Scholtz
 * @see ViewScoped
 * @see ViewScopeContext
 * @see ViewScopeManager
 * @since 1.6
 */
public class ViewScopeExtension implements Extension {

	// Variables ------------------------------------------------------------------------------------------------------

	private Bean bean;

	// Actions --------------------------------------------------------------------------------------------------------

	/**
	 * Obtain an instance of the view scope manager bean.
	 * @param event The process managed bean event.
	 */
	protected void processManagedBeans(@Observes ProcessManagedBean event) {
		bean = event.getBean();
	}

	/**
	 * Register a new view scope context, wrapping the given bean manager and view scope manager bean, in the current
	 * CDI context.
	 * @param event The after bean discovery event.
	 * @param manager The bean manager.
	 */
	protected void afterBeanDiscovery(@Observes AfterBeanDiscovery event, BeanManager manager) {
		event.addContext(new ViewScopeContext(manager, bean));
	}

}